Suppressing meta-holographic artifacts by laser coherence tuning

Hui W. Cao

doi:10.1117/12.2594027

1 August 2021 Suppressing meta-holographic artifacts by laser coherence tuning

Hui W. Cao

Proceedings Volume 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX; 117970O (2021) https://doi.org/10.1117/12.2594027
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

A metasurface hologram combines fine spatial resolution and large viewing angles with a planar form factor and compact size. However, it suffers coherent artifacts originating from electromagnetic cross-talk between meta-atoms and nanofabrication defects. We introduce an efficient method to remove all artifacts by fine-tuning the spatial coherence of illumination. Our method is implemented with a degenerate cavity laser, which allows precise, continuous tuning of spatial coherence over a wide range with little variation in emission spectrum and total power. We find the optimal degree of spatial coherence to remove the coherent artifacts of a meta-hologram while maintaining the image sharpness.

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Citation Download Citation

Hui W. Cao "Suppressing meta-holographic artifacts by laser coherence tuning", Proc. SPIE 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX, 117970O (1 August 2021); https://doi.org/10.1117/12.2594027

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KEYWORDS

Spatial coherence

Dispersion

Holography

Light emitting diodes

Multiplexing

Nonlinear optics

Optical manipulation

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